Heel insole



FIG. 1 is a top front perspective view of a heel insole showing our new design for use on the right foot;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front end view thereof;

FIG. 4 is a rear end view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a top plan view of a heel insole showing a second embodiment of our new design for use on the left foot, the other views all being mirror images of those of the first embodiment. 

The ornamental design for a heel insole, as shown and described. 